1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 341Get this manual
Motor Test, No Load
fasten motor in suitable fixture before proceeding with this test
1Use battery rated at 360 cold cranking amps or higher that is in good condition and fully charged to perform this test2Connect 0-50 amp ammeter in series with the battery'sterminal, ammeter RED lead toward terminal3 Attach or hold vibration or mechanical tachometer to the motor while performing this test
4Monitor motor RPM and current drawRefer to the chart below for the correct specifications for your motor
Viewed from the pump end, the motor shaft must rotate in clockwise direction when batteryis applied to the BLUE leadViewed from the pump end, the motor shaft must rotate in counterclockwise direction when batteryis applied to the GREEN lead7Service the motor if your test results vary